Emergency Preparedness and Incident Investigation
Emergency preparedness requires a documented, exercised plan covering identification of credible scenarios, alarm and communication systems, evacuation and shelter-in-place, roles, assembly and accounting for people, and interface with external responders. Know the difference between a drill (tested response) and an exercise (broader simulation), and that plans must be reviewed after drills, incidents, and changes.
Incident investigation should be systematic and focused on causes, not blame. Understand the distinction between immediate causes (unsafe acts and conditions) and root or underlying causes (management system failures such as inadequate training, poor design, or missing maintenance). Familiarize yourself with evidence preservation, witness interviewing, timeline construction, and the causal tree or five-why technique. Know that near misses are free lessons and should be investigated proportionately.
Traps: concluding that human error is a root cause; stopping at the immediate cause; investigating only lost-time incidents; and writing recommendations that are vague or not assigned to an owner and date.
Rule of thumb: ask "why" until you reach a system condition that could be changed, then assign a control from the hierarchy. Worked example: a worker falls from a ladder. Immediate cause: lost balance. Underlying causes: ladder not secured, no inspection, no training, and production pressure to work quickly. Effective recommendations address securing, inspection, training, and scheduling.